Carburetor cut-off



Nov. 17,1925.

H. W. MOIR CARBURETOR CUT-OFF Original Filed April 26, 1920 entirelydisconnect Patented Nov. 17, 1925 UNITED TATES ARRYW OIR; or LosANGEIQZES,CALIFORNIA,nfsSIGIiQRfbIotI "H'YVTTOV" E in:

r ngivi nns, or, osANGnnns; ciinironniii 7 I'CARBUIIKIETOR ou'r oiirfApplication filed Apr'il 20, 1920, Serial No. 375,380. .mewei ri1, -18;192:5. 7

T0 allwhomitmag concern:

Be it known that 'I, HARRY W. Mom, a citizen of theUnited States,and aresident of Los Angeles, county-of Los Angeles, and

State of California, have invented a new and useful Improvement inCarburetor CutsOifs,

of which thefo llowing is a specification, the

principle of the invention being herein ex- 'plained 7 contemplatedapplying that principle, so'as to distinguish it-from other invent-ions.

' The present invention," relating, J as indicated, to carburetorcut-offs, is more particularly directed to a device'for use inconnection with a carburetor for an internal combu'stion engine for thepurpose of disconnecting the carburetor from the intake manifold of theengine.

the carburetorlfrom the engine 'to prevent the wastageof gasoline, aswhen,"for example, a vehicle is coasting down hill withthe engine actingas-a brake. Insuch a situation the engineyinstead of operating thevehicle is being in turn operated by the rotation of the vehicle-wheels,

andun'der such conditions the ignition .is

'usl'ially switched inthe'cylinders "acts to brake against the movementof the vehicle. In 'i'nountainous country this is a verycoinmon way ofbraking a car, and sometimes for periods of minutes at a time the engineis being operated by the car, but without the combustion of anygasoline. At such times gaso line vapor is drawn through the engine asif the engine were operating, but all of this gasoline is entirelywasted. The carburetors in common use are not provided with any meansfor disconnecting them from the engine, and it is to provide asimpleineans for convenient attachment to the carburetor that thepresent invention has been developed. To the accomplishment of theforegoing and related ends, said invention,-

anism embodying the invention, such disclosed means constitut ng,however, but one.

and the best mode in which I have.

closed position; and, Fig the line, 7-:7, in Figd}.

' It is :desirable at times-to" duit3; carburetor {i isordinarily jdirectly ,to; the lower flanged .end pf :ajconmanifold. My device.comprises off and the. compression plates 6," and; 7 11S; .forined the,manifold .land l the' of Variousmechaiiical forms lin wh ich ithe In;said 7 annexed drawing H 1 Fig. 1 is-a side elevation OfggaI lii nt nalcombustion engine mounted in a motor ivehicle with my inventionnapplied;thereto Fig.

is a s de leva n; ot t e. i r$ 1. 2;v-. en for t e de e F g- 6 p anriewfii t dev1 1 ,g-:5: S iplan vi w'w the eve P e: emoved showingthemech ii mi .principle of the invention may be used ,Qis asideelevation of my. dviceyFig; ,3

operative po-sitionyFig. 6 a similar view,:;

In Fig. 1 1 have shown ,{1 of an internal combustionengine 'towhich I isatta ched the usual intake manifold 2,.

duit B, and mydevice 'is adaptedi interposed between, :the, ,carbur or tdr it -or nssfi r. t fiiase f bolts Whl0l1,f2l$il61l, thefdeyice betweeithel manifold and the carburetor; I the the samesizeandfladapted a Q IWiththe. passage through i the carburetor 4. T

Pivotally mounted about an axisin the form of a stud 10 is a valvemember 11,- which is shown in its operative position iniji 76,

assage p 9;, of

Fig. 5, but which may be swunginto the position shown in-'F-ig. 6 whenit, will. entirely close the passage through my device and thusdisconnect the carburetor from. the manifold. Operation, of the valve isse cured by means ofa link 12 mounted exteriorlyof the device on theprojecting end of thestud 10 and connected bya Wire or rod 13 to anoperating handle 14c,-'which is suitably mounted on the dash or foot Iboard 15 of the vehicle. This operating wire or rod is slidably-disposedin an enclosing tube or casing 16 mounted on the foot board 15 at oneend and in a projection 18 on the device atiits other end.

same time as the valve 11, the latter be;

ing provided with a projecting arm 25 which is forced against the'valve'21 when the valve 11 is moved into the position shown in Fig; '6, andthus serves topush the-valve 21 open. Air is then admitted through theopening from the atmosphere to the passage in the manifold, the

air'passing through theopeningQO andth'en overl beveled -ofi' edgeportion 26 on one side of the Valve member 11. the valve 11" is inposition to disconnect the carburetor from the manifold it has openedthe valve- 21 and air is then drawn into the manifold-from theatmosphere, in this 'way' permitting the engine to operate in "the usualway, andf 'to give its full braking effect on the vehicle because of thecompression of the air which'is drawn in in this manner. 30'

of my invention may be employed instead Other modes of applying theprinciple fof the on'e ex'pl'ained, change being made as regards themechanism herein disclosed,

"provided the means stated by any'of the-following claims or theequivalent of such stated mean'sbe employed; i 1

V I I thereforeparticularly point out and distinctly claim as myinvention I. A device adapted to be interposed between the carburetorand intake manifold of. an internal combustion engine, said devicecomprisinga chamberhaving a longi- 'tudinal"openingitherethrough, and asec- 'on'd open'ijn'g tethe atmosphere, a valve movable transversely ofsuch longitudinal-open- Thus,- when ing to close the same, and a secondvalve mounted externally of said apparatus and normally closing suchsecond opening, said first-named valve being adapted toengage and opensaid second valve upon the closing of said first-named valve.

2. A device adapted to be interposedbetween the carburetor and-intakemanifold of an internal combustion engine, said device comprising achamber having a longitudinal opening therethrough, and a second openingtothe atmosphere, a valve adapted to close such opening through saidchamber, and a second valve normally closing such second opening, saidfirst-named valve being adapted to engage .and op'eu said second valveupon the closing of said first-named valve, and-said first-named valvemember being forinedwith-a passageconnesting witlnsuch second opening insaid chamber in the closed position of. said valve, such passage leadingtosuch opening through said chamber' on on-eiside of said valvecontrolling the same. I i I 3. A device adapted to lee-interposed be-.tween" the carburetor and: intake manifold of an internal combustionengine, said deto 'close such opening through. said chamher, and. asecond valve normally closlng such second opening, said. first-namedvalve:

passage leading. to such-opening through said: chamber on one side ofsaidvalve controlling thesame;

Signed by me this-14th as Grape, 1920.: I a I I HARRY W. io in;v

vice comprising a chamber having. a longi-- j tudinal openingtherethrough, and a second openlng to' the atmosphere, a valve adapted

